Abstract
An ultra-wideband (UWB) low noise amplifier (LNA) for 3.3–13.0 GHz wireless applications using 90 nm CMOS is proposed in this paper. The proposed LNA uses an improved common-gate (CG) topology utilizing feedback body biasing (FBB), which improves noise figure (NF) by a considerable amount. Parallel-series tuned LC network was used between the common-gate first stage and the cascoded common-source (CS) stage to achieve the maximum signal flow from CG to CS stage. Improved CS topology with a series inductor at the drain terminal in the second stage connected and cascoded CS third stage provides high power gain (S21) and bandwidth enhancement throughout the complete UWB. A common-drain buffer stage at the output provides high output reflection coefficient (S22). It achieves an average power gain (S21) of 14.7 ± 0.5 dB with a noise figure (NF) of 3.0–3.7 dB. It has an input reflection coefficient (S11) less than −11.7 dB for 3.3–13.0 GHz frequency and output reflection coefficient (S22) of less than −10.6 dB with a very high reversion isolation (S12) of less than −72.4 dB. It consumes only 5.2 mW from a 0.7 V power supply.
Highlights
The Federal Communications Commission (FCC), in 2002, offered a 3.1–10.6 GHz ultra-wideband frequency (UWB) range, for the implementation of very high data rate wireless communication links [1]
This paper reports a design of a low-power low noise amplifier (LNA) using CG feedback-body biased topology for for an UWB frequency
The CG first stage has been cascoded with two stages of common source configuration and the power consumption, whereas the transistor M2 is cascoded with M1 to enhance the gain of using transistors M3 and M4 respectively, to enhance the gain and bandwidth proposed for UWB LNA
Summary
The Federal Communications Commission (FCC), in 2002, offered a 3.1–10.6 GHz ultra-wideband frequency (UWB) range, for the implementation of very high data rate wireless communication links [1]. LNA as a primary module of UWB wireless communication receiver requires designers to meet many challenges like 50 Ω input matching, a low noise figure, flat gain, low power, and the receiver’s. This paper reports a design of a low-power LNA using CG feedback-body biased topology for for an UWB frequency. The transistor M1 has been configured to feedback-body biasing through and the power consumption, whereas the transistor M2 is cascoded with M1 to enhance the gain of the feedback resistor R1 connected to drain terminal of M2, to boost-up the noise figure performance the first stage. The CG first stage has been cascoded with two stages of common source configuration and the power consumption, whereas the transistor M2 is cascoded with M1 to enhance the gain of using transistors M3 and M4 respectively, to enhance the gain and bandwidth proposed for UWB LNA.
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